|Place of origin||United States|
|Parent case||.30-06 Springfield|
|Case type||Rimless, bottleneck|
|Bullet diameter||.264 in (6.7 mm)|
|Neck diameter||.296 in (7.5 mm)|
|Shoulder diameter||.4425 in (11.24 mm)|
|Base diameter||.4698 in (11.93 mm)|
|Rim diameter||.473 in (12.0 mm)|
|Rim thickness||.034 in (0.86 mm)|
|Case length||2.494 in (63.3 mm)|
|Overall length||3.44 in (87 mm)|
|Primer type||Large rifle|
|Maximum pressure||60,200 psi (415 MPa)|
|Source(s): A-Square Co.|
The 6.5-06 A-Square is a centerfire rifle cartridge that originated as a wildcat, based on the popular .30-06 Springfield. A-Square standardized the dimensions of the cartridge and submitted them to SAAMI in 1997.
The 6.5-06 A-Square uses a .264" diameter bullet loaded into a modified .30-06 Springfield cartridge. The neck is reduced to accept the smaller bullet, the shoulder is longer than that of the parent cartridge, and it has a 17.5 degree shoulder angle leading to the neck of the case, where the bullet is seated.
The 6.5-06 A-Square has power similar to that of the .270 Winchester and .308 Winchester, making it suitable for hunting medium-sized game such as deer and black bear. It is also used in competitions such as F-Class and Benchrest formats.
Availability of ammunition
Currently (2011) none of the major commercial ammunition manufacturers offer factory loaded 6.5-06 A-Square ammunition. There are smaller companies that custom load the cartridge however, and hand-loading can be accomplished using the proper set of dies and using .25-06 Remington, .270 Winchester, or .30-06 Springfield brass and making the proper modifications to fit the 6.5-06 A-Square chamber. After firing, the brass from the original cartridge (.25-06 Remington, .270 Winchester, or .30-06 Springfield) will be fire-formed to the exact dimensions of the 6.5-06 A-Square chamber.
Firearms chambered for 6.5-06 A-Square
As of 2011 A-Square listed two different rifles factory chambered in 6.5-06 A-Square; the Hamilcar and the Genghis Khan. Several of the major custom barrel manufacturers offer the 6.5-06 A-Square (sometimes listed simply as 6.5-06) chamber as an option for builders of custom rifles. However, On 15 February 2012, the A-Square Company ceased to exist.
- List of rifle cartridges
- Glossary of firearms terminology
- Wildcat cartridges based on the .30-06 Springfield
- "Archived copy" (PDF). Archived from the original (PDF) on 2011-07-26. Retrieved 2011-04-19.CS1 maint: Archived copy as title (link)
- "Archived copy". Archived from the original on 2010-08-21. Retrieved 2011-04-19.CS1 maint: Archived copy as title (link)